If the E3 error code appears on the user interface of your Midea air conditioning unit, it means the system is detecting a problem in the combined water outlet temperature sensor or thermistor of the outdoor sub-unit. The fault may be in a malfunctioning outdoor thermistor, the wiring connecting the sensor to the outdoor PCB mainboard terminal, or any of the associated parts. Ensuring that the sensor makes accurate temperature readings at all times is important to maintain good cooling performance and energy efficiency.
Since the Midea aircon E3 error code is fairly specific in pointing to the likeliest source of the fault, troubleshooting to clear the issue is a pretty straightforward affair. Switch off the indoor AC unit, unplug it from the power outlet, and then carefully look over the outdoor unit. You need to be able to access the internal parts of the outdoor unit. Pay attention to the outdoor thermistor, which is a black wire with a copper sensor head. Make sure it is clean, undamaged, and its wiring’s contact point is secure in the PCB terminal. Clean the surrounding parts, as well. More importantly, there should be no signs of corrosion or pitting on the sensor head. Once everything seems in order, close up the outdoor AC cover, plug the unit back in, and then turn it on. The display should be clear of error codes at this point. If the E3 error code is still there, then consider getting in touch with a service technician.
Replacing a defective outdoor thermistor, if it is indeed the underlying cause of the persistent Midea aircon E3 error, is quite easy and uncomplicated if you decide to go with Silverback Aircon which has already a well-maintained and inventoried collection of refurbished Midea aircon spare parts. The table below summarizes the potential costs of repair and replacement for an E3 error code scenario caused by a malfunctioning outdoor thermistor or outdoor PCB.
It is important to note that in case a failure in the outdoor PCB terminal (where the outdoor thermistor is attached) is ultimately the cause of the persistent E3 error code, Silverback Aircon has a long-standing practice of simply replacing the full circuit box containing all the outdoor PCBs, and not just one of them. If the model of your Midea condenser unit is M30A21CDN1QC4, then it has three PCBs–the control board, power board, and noise filter. For the Midea condenser unit model MS9A109CRDN1QC4, however, there are only two outdoor PCBs–control board and power board. So, to fully clear the E3 error caused by a malfunctioning PCB, Silverback Aircon will install the entire circuit box containing the set of PCBs matching the model of your condenser unit.
To finally resolve any outdoor thermistor issue (or outdoor PCB problem) that may be behind the E3 error that you can’t clear from your Midea air conditioning unit through routine troubleshooting, take advantage of Silverback Aircon’s free professional consultation service over Whatsapp. We will even give you a quote on the estimated cost of repair and possible replacement of parts. Also, be ready with the model number of the indoor AC unit (refer to the sticker attached to the fan coil unit) as well as the outdoor unit (refer to the invoice sticker) before you call us; we need the information to more efficiently assist you in getting to the bottom of the E3 error on your Midea aircon.
